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STATE HISTORIC BRIDGE INVENTORY AND EVALUATION 2024 UPDATE <br /> The bridge's original materials, particularly the basalt or brick used in the arch ring and vault, must not <br /> be adversely affected by alterations or additions. The quality of the original workmanship must remain <br /> apparent, with substantial evidence of artisan's labor and skill. The bridges must retain a high degree of <br /> historic feeling, and their associations must be apparent to the informed or casual observer. <br /> METAL BRIDGES <br /> i <br /> IF <br /> , 1r_ 0 <br /> f. <br /> Transverse Section <br /> Elevation <br /> FIGURE 3.THROUGH TRUSS BRIDGE. <br /> '... .,,,,,\ ilVVIVA N , a.. ,..........i.*...... <br /> ' A f/ <br /> n f <br /> „... . ' <br /> \ <br /> _ Transverse Section <br /> FIGURE 4. PONY TRUSS BRIDGE. <br /> \ -7N...\\i/V\ /1.\-, . <br /> ,V�".,1r , , Transverse Section <br /> Bsys cn <br /> FIGURE 5. DECK TRUSS BRIDGE. <br /> cIII: ! 20 <br />